CN115691856A - Paste for laser printing - Google Patents
Paste for laser printing Download PDFInfo
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- CN115691856A CN115691856A CN202211557206.5A CN202211557206A CN115691856A CN 115691856 A CN115691856 A CN 115691856A CN 202211557206 A CN202211557206 A CN 202211557206A CN 115691856 A CN115691856 A CN 115691856A
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- 238000007648 laser printing Methods 0.000 title claims abstract description 51
- 239000002002 slurry Substances 0.000 claims abstract description 62
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 49
- 239000000853 adhesive Substances 0.000 claims abstract description 34
- 230000001070 adhesive effect Effects 0.000 claims abstract description 34
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003085 diluting agent Substances 0.000 claims abstract description 25
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 24
- 239000013543 active substance Substances 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims description 7
- 239000001856 Ethyl cellulose Substances 0.000 claims description 6
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 claims description 6
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 claims description 6
- 229920001249 ethyl cellulose Polymers 0.000 claims description 6
- 235000019325 ethyl cellulose Nutrition 0.000 claims description 6
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 claims description 6
- 229920002545 silicone oil Polymers 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000007650 screen-printing Methods 0.000 abstract description 16
- 238000005516 engineering process Methods 0.000 abstract description 15
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052710 silicon Inorganic materials 0.000 abstract description 7
- 239000010703 silicon Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 12
- 239000002904 solvent Substances 0.000 description 7
- 238000007639 printing Methods 0.000 description 6
- 238000005245 sintering Methods 0.000 description 6
- 230000003749 cleanliness Effects 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a slurry for laser printing, which comprises the following raw materials: 93-96 parts of conductive silver paste, 0.8-2.0 parts of adhesive, 0.5-1.2 parts of curing agent, 0.7-1.0 part of release agent, 0.8-1.2 parts of diluent, 0.2-1.0 part of defoaming agent and 0.6-0.8 part of active agent. The paste for laser printing can be directly applied to the laser printing technology, namely, the paste is printed on the battery piece through laser beams, and compared with the traditional screen printing technology, the laser-printed grid line pattern has smaller width and higher height; because the width of the grid line is smaller, the solar light receiving area of the cell is larger, the absorbed light is stronger, the whole conversion efficiency is higher, the grid line becomes higher, the performance of the grid line is not reduced while the light receiving area is improved, the grid line is more uniform in shape, the adhesive force of slurry attached to the grid line is stronger, and therefore the conversion efficiency of the silicon solar cell is improved.
Description
Technical Field
The invention belongs to the technical field of solar cells, relates to preparation of a positive grid line of a solar cell, and particularly relates to slurry for laser printing.
Background
At present, in a manufacturing process of a silicon solar cell, grid lines are firstly engraved on the surface of the cell through laser, then conductive paste is printed in the grid lines on the front surface through a screen printing technology, but various product defects are easy to occur in the screen printing process, the most easy-to-occur product defects are dotted lines, one is a defect that the external width of a silver paste line is narrowed or broken, and the other is a defect that the external width of the silver paste line is unchanged and the thickness of the silver paste line is thinned; in the printing process, the silk screen is contacted with a substrate (silicon wafer), so that the damage and secondary pollution of the silicon wafer are easily caused; at present, the printing precision and the aspect ratio of the printing fine grid are difficult to improve. Although the screen printing process also goes through the conversion from one printing to multiple printing, the aspect ratio of the grid line is improved, but the improvement of the efficiency is less than the quality problems of difficult control of printing precision, grid extension and the like brought by the improvement of the efficiency.
In addition, because the slurry has conductivity, after the slurry is sintered in the grid lines by using the silk screen, the conductive slurry is directly in electrical contact with the cell and forms a grid line type front electrode, so that the contact effect of the front electrode formed by the conductive slurry and the cell is one of important factors determining the photoelectric conversion efficiency of the silicon solar cell, and the performance of the slurry directly influences the power, conductivity, adhesive force and conversion efficiency of the silicon cell.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a paste for laser printing, which not only solves the problems of too wide width and too short height of a screen printing grid line, but also enables the paste to be more uniform in the grid line and stronger in adhesive force, thereby prolonging the service life of the whole battery piece and improving the photoelectric conversion efficiency.
The invention is realized by adopting the following technical scheme:
the slurry for laser printing comprises the following raw materials: 93-96 parts of conductive silver paste, 0.8-2.0 parts of adhesive, 0.5-1.2 parts of curing agent, 0.7-1.0 part of release agent, 0.8-1.2 parts of diluent, 0.2-1.0 part of defoaming agent and 0.6-0.8 part of active agent.
The scheme of the invention is that the existing conductive silver paste suitable for the screen printing technology is technically improved, and experiments prove that the conductive silver paste is added with an adhesive, a curing agent, a release agent, a diluent, a defoaming agent, an active agent and the like, and can be applied to laser printing.
Further preferably, the composite material comprises the following raw materials: 94-95.5 parts of conductive silver paste, 1.0-1.7 parts of adhesive, 0.5-1.0 part of curing agent, 0.7-1.0 part of release agent, 1.0-1.2 parts of diluent, 0.5-1.0 part of defoaming agent and 0.6-0.8 part of active agent.
Further preferably, the composite material comprises the following raw materials: 94 parts of conductive silver paste, 1.5-1.7 parts of adhesive, 0.8-1.0 part of curing agent, 0.8-1.0 part of release agent, 1.0-1.2 parts of diluent, 0.6-1.0 part of defoaming agent and 0.7 part of active agent.
More preferably, the total amount of the conductive silver paste, the binder, the curing agent, the release agent, the diluent, the defoaming agent and the activator is 100 parts.
Further preferably, the binder is ethyl cellulose; the curing agent is polyamide; the release agent adopts dimethyl silicone oil; the diluent adopts diethylene glycol monobutyl ether; the defoaming agent adopts silicone oil; the active agent adopts polyethylene glycol.
The slurry for laser printing is prepared by the following method: 1. weighing conductive silver paste, an adhesive, a curing agent, a release agent, a diluent, a defoaming agent and an active agent according to the proportion of the components in the solar cell slurry; 2. firstly, dripping a diluent diethylene glycol monobutyl ether in the ingredients into ethyl cellulose serving as an adhesive according to the mixture ratio, and directly adding the mixture into conductive silver paste for mixing after the adhesive is completely dissolved; 3. and (2) continuously adding a curing agent, a release agent, a defoaming agent and an active agent according to the proportion, fully mixing, placing in a high-speed mixer, uniformly stirring to obtain uniform slurry, finally placing the slurry in a three-roll grinder, grinding until the fineness of the conductive slurry is less than 15 mu m, the viscosity of the slurry is 200-450pa.s, the solid content is 90-93%, and the surface leveling property of the slurry is stronger.
In the laser printing technology, slurry is required to be coated on a carrier plate, and then the slurry is printed on a battery piece through a laser beam; the paste needs to be uniformly coated on the carrier plate, so the paste needs to have certain viscosity to be attached on the carrier plate, and after laser printing, the paste needs to be completely printed on the battery piece. After the existing conductive silver paste is improved, the conductive silver paste can be directly applied to a laser printing technology, wherein the laser printing is to print the paste on a battery piece through a laser beam, and compared with the traditional screen printing technology, the grid line pattern printed by the laser is smaller in width and higher in height; because the width of the grid line is smaller, the solar light receiving area of the cell is larger, the absorbed light is stronger, the whole conversion efficiency is higher, the grid line becomes higher, the performance of the grid line is not reduced while the light receiving area is improved, the grid line is more uniform in shape, the adhesive force of slurry attached to the grid line is stronger, and therefore the conversion efficiency of the silicon solar cell is improved.
The grid line printed by the laser printing slurry is reasonable in design, and compared with the grid line manufactured by traditional screen printing, the grid line printed by the laser printing slurry is narrower in width and higher in height, and has good practical application value.
Drawings
FIG. 1 shows a graph of the width of a laser printed grid line of example A-1 set, where the width is 18.488 μm.
Figure 2 shows a graph of the height of a laser printed grid line set of example a-1, where the height is 9.32 μm.
FIG. 3 shows a graph of the width of a set of laser printed grid lines of example B-1, where the width is 17.420 μm.
Figure 4 shows a graph of the height of a set of laser printed grid lines of example B-1, where the height is 9.14 μm.
FIG. 5 shows a graph of the width of a laser printed grid line of example C-1 set, where the width is 16.781 μm.
Figure 6 shows a graph of the height of a laser printed grid line of example C-1 set, where the height is 9.59 μm.
FIG. 7 shows a graph of the width of a laser printed grid line of example D-1 set, where the width is 17.315 μm.
FIG. 8 shows a set of laser printed grid line height plots for example D-1, where the height is 10.44 μm.
FIG. 9 shows a graph of the width of an example D-2 set of laser printed grid lines, where the width is 16.850 μm.
Figure 10 shows a graph of the height of a laser printed grid line of example D-2 set, where the height is 10.09 μm.
FIG. 11 shows a graph of the width of example E-1 set of laser printed grid lines, where the width is 16.809 μm.
FIG. 12 shows a set of laser printed grid line height plots for example E-1, where the height is 10.18 μm.
FIG. 13 shows a graph of example E-2 set laser printed grid line widths, where the widths are 16.786 μm.
Figure 14 shows a graph of the height of example E-2 set of laser printed grid lines where the height is 11.42 μm.
FIG. 15 shows a plot of the width of the grid lines for example E-3 set of laser printed lines, where the width is 16.192 μm.
Figure 16 shows a graph of the height of a laser printed grid line of example E-3 set, where the height is 10.79 μm.
FIG. 17 shows a graph of the width of a laser printed grid line of example F-1 set, where the width is 15.797 μm.
FIG. 18 shows a graph of the height of a laser printed grid line of example F-1 set, where the height is 11.51 μm.
FIG. 19 shows a graph of the width of a laser printed grid line of example F-2 set, where the width is 15.645 μm.
Figure 20 shows a graph of the height of a laser printed grid line of example F-2 set, where the height is 11.23 μm.
FIG. 21 shows a graph of the width of a laser printed grid line of example F-3 set, where the width is 15.136 μm.
FIG. 22 shows a graph of the height of a laser printed grid line of example set F-3, where the height is 11.41 μm.
FIG. 23 shows a graph of the width of an example F-4 set of laser printed grid lines, where the width is 16.062 μm.
Figure 24 shows a graph of the height of a laser printed grid line of example F-4 set, where the height is 11.42 μm.
FIG. 25 is a graph showing the width of example G-1 set of laser printed grid lines, where the width is 16.673 μm.
FIG. 26 shows a graph of the height of a laser printed grid line of example group G-1, where the height is 10.89 μm.
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
In order to enable the conductive silver paste applied to the screen printing technology to be suitable for laser printing, the conductive silver paste is technically improved, and through experimental verification, an adhesive, a curing agent, a release agent, a diluent, a defoaming agent, an active agent and the like are added.
The invention relates to a slurry for laser printing, which comprises the following raw materials: 93-96 parts of conductive silver paste, 0.8-2.0 parts of adhesive, 0.5-1.2 parts of curing agent, 0.7-1.0 part of release agent, 0.8-1.2 parts of diluent, 0.2-1.0 part of defoaming agent and 0.6-0.8 part of active agent.
In the laser printing technology, slurry is required to be coated on a carrier plate, and then the slurry is printed on a battery piece through a laser beam; the paste needs to be uniformly coated on the carrier plate, so the paste needs to have certain viscosity to be attached on the carrier plate, and after laser printing, the paste needs to be completely printed on the battery piece.
Wherein the conductive silver paste is obtained by outsourcing.
The adhesive can make the slurry have viscosity, so that the slurry can be adhered to a carrier plate for laser printing, and can also be adhered to a battery piece after laser printing without falling off, thereby ensuring the service life of the battery piece; in the embodiment of the invention, ethyl cellulose is used as the adhesive.
The release agent is fused in the slurry, so that the slurry coated on the carrier plate can completely fall off from the carrier plate in the grid line of the battery plate through laser irradiation in the laser printing process, and cannot remain on the carrier plate to influence the subsequent process; in the embodiment of the invention, the release agent is dimethyl silicone oil.
The activating agent enables the slurry to have better fluidity, and has a promoting effect on both coating on the carrier plate and laser printing, so that the slurry has stronger fluidity, can be better coated on the carrier plate and recycled, avoids unnecessary waste, and is more favorable for laser printing and shaping; in the embodiment of the invention, the active agent adopts polyethylene glycol.
The curing agent enables the whole slurry to have a certain solid shape, cannot flow randomly like water flow, and has certain viscosity; in the examples of the present invention, polyamide was used as the curing agent.
The main function of the thinner is to improve the technological performance of the slurry, so that the slurry is convenient to be effectively printed in the grid line of the battery piece in the using process; the diluent can reduce the viscosity of the adhesive, is a liquid substance which is added to improve the technological performance of the slurry and has good miscibility with the adhesive, and the prepared diluent is required to be fully dissolved when the slurry is prepared; in the embodiment of the invention, the diluent adopts diethylene glycol monobutyl ether.
The defoaming agent is used for removing bubbles in the process of preparing the slurry and preventing the slurry from having bad conditions in the laser printing battery piece at the later stage; in the embodiment of the invention, silicone oil is adopted as the defoaming agent.
According to the improvement, the existing conductive silver paste is suitable for the laser printing technology, and the specific embodiment is as follows:
the preparation method of the slurry for laser printing in the above embodiment: 1. weighing conductive silver paste, an adhesive, a curing agent, a release agent, a diluent, a defoaming agent and an active agent according to the proportion of the components in the paste; 2. firstly, dripping a diluent diethylene glycol monobutyl ether in the ingredients into ethyl cellulose serving as an adhesive according to the mixture ratio, and directly adding the mixture into conductive silver paste for mixing after the adhesive is completely dissolved; 3. and (2) continuously adding a curing agent, a release agent, a defoaming agent and an active agent according to the proportion, fully mixing, placing in a high-speed mixer, uniformly stirring to obtain uniform slurry, finally placing the slurry in a three-roll grinder, grinding until the fineness of the conductive slurry is less than 15 mu m, the viscosity of the slurry is 200-450pa.s, the solid content is 90-93%, and the surface leveling property of the slurry is stronger.
The above examples were tested for performance as follows:
1. and detecting the width and height of the grid line and the cleanliness of the carrier plate by adopting a Gihnes VHX-7000 series 3D digital microscope.
2. The viscosity count was read using a Brookfield viscometer, spindle 14, 10 rpm for 4-5 minutes.
3. And a scraper fineness meter is adopted to detect the fineness of the slurry.
The specific detailed performance parameters are as follows:
comparative example a-1 the overall paste properties did not differ much when the original paste was used without the addition of a special solvent for treatment, but the width of the laser printing was relatively large, the height was relatively small, and the grid breakage and unevenness were more likely to occur during the laser printing.
Compared with B-1~C-1, after partial solvent treatment is added, the fineness of the slurry is improved, the width of a grid line printed by laser is relatively small, the height of the grid line is relatively large, the overall width-to-height ratio is also improved, the cleaning degree of the support plate is also improved, and the grid breaking phenomenon still occurs.
In the comparative example D-1~D-2, all the solvent in a certain ratio is added according to a certain ratio, the viscosity of the slurry is improved, the fineness of the slurry is basically kept equal, but the width-height ratio of the obtained grid line is higher, the grid breaking condition does not occur, and the cleanliness of the carrier plate is not improved greatly.
The test result corresponding to the comparative example E-1~E-3 shows that the proportion of the added proportioning solvent is increased, so that the prepared slurry has a higher aspect ratio and is more stable when the grid line is printed by laser, the fineness of the slurry is improved, and the proportion of the added solvent is increased to present an obvious optimization trend.
By continuously increasing the proportion of the share of the conductive paste compared with the embodiment F-1~G-1, the laser printing aspect ratio is higher and more stable, the cleanliness of the carrier plate also reaches up to 99.5%, and the conductive paste is basically clean and tidy, the performance of the conductive paste is in a neutral performance value compared with the previous data, and the effect of laser printing grid lines cannot be improved any more by continuously increasing the amount of a certain solvent and the amount of all solvents according to the comparison of two groups of data of F-4 and G-1, so that the conductive paste provided by the invention has excellent performances in grid line width, grid line height, carrier plate cleanliness, paste viscosity, paste fineness and uniformity through comparing F-1~F-3 test results.
Compared with the prior art of screen printing grid lines, the invention realizes that the paste is directly printed in the grid lines by adopting the laser printing technology. Because the traditional slurry has the problems of stronger viscosity and adhesive force, poor fluidity and the like, the slurry can not be completely printed in the direct laser printing process, or can be attached to a carrier plate, even the phenomenon of grid breaking can directly occur on a battery piece, and the poor fluidity can also cause uneven coating in the coating process, so that grid lines printed by laser at the back are uneven, the conversion efficiency of the final battery piece is not high, and the like. After the embodiment of the invention improves the existing conductive silver paste, the paste used for laser printing after proportioning and blending has good indexes of viscosity, fineness, solid content, fluidity and demolding property and is suitable for a laser printing technology, and compared with the existing technology of screen printing grid lines, the paste prepared by using the formula is combined with the laser printing technology, the width of the grid lines printed by adopting laser printing grid lines is smaller, the height of the grid lines is higher, so that the using amount of the paste is greatly saved, because the grid lines printed by the laser are smaller and are 40% -70% smaller than the width of the grid lines printed by the screen printing, for the whole cell, the solar light irradiation area received by the cell is larger, the grid lines are higher, the performance of the grid lines is not reduced while the light irradiation area is increased, the grid line shape printed by the laser is more uniform, the adhesive force of the paste attached to the grid lines is stronger, because the photovoltaic cell is used outdoors, and if the grid line width is larger and the adhesive force is larger, the performance of the grid lines is stronger, and the service life is longer. In addition, after the traditional screen printing is adopted, the battery piece needs to be subjected to a high-temperature sintering process, because the conductive paste and the battery piece form electric contact after sintering and form a grid-line-type front electrode, the paste can be completely attached to the battery piece at this time, and because the contact effect of the battery piece and the conductive paste for forming the front electrode is one of important factors for determining the photoelectric conversion efficiency, when the battery piece is transported to a sintering process station through logistics after the screen printing is finished, the paste on the grid line can be displaced due to transportation vibration and grabbing displacement, the grid line finally sintered is broken, and the grid line is not uniform, and because the screen printing is only attached to the battery piece by the viscosity of the paste. And grid line through after the laser printing then can not appear this kind of condition, because the laser printing is through coating the thick liquids on the support plate earlier, in rethread laser printing to the grid line of battery piece, because laser self just lets thick liquids drawing of patterns to the battery piece on through high-temperature heating, so there is a preliminary high temperature sintering solidification to the grid line on this technology is printed to the laser, so when transporting again to the sintering station, the grid line that just can not appear sintering and come out has disconnected grid, the inhomogeneous condition of grid line. And as the laser printing is to coat the slurry on the carrier plate firstly and then to print the slurry into the grid lines of the battery pieces through the laser, the carrier plate can be coated with the slurry according to the amount of the slurry printed by the laser, compared with the method that the grid lines are printed on the same battery piece through silk-screen printing, the used slurry is less, and the slurry can be well saved.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the detailed description is made with reference to the embodiments of the present invention, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which shall be covered by the claims of the present invention.
Claims (9)
1. A paste for laser printing, characterized by: comprises the following raw materials:
93-96 parts of conductive silver paste, 0.8-2.0 parts of adhesive, 0.5-1.2 parts of curing agent, 0.7-1.0 part of release agent, 0.8-1.2 parts of diluent, 0.2-1.0 part of defoaming agent and 0.6-0.8 part of active agent.
2. The paste for laser printing according to claim 1, wherein: comprises the following raw materials: 94-95.5 parts of conductive silver paste, 1.0-1.7 parts of adhesive, 0.5-1.0 part of curing agent, 0.7-1.0 part of release agent, 1.0-1.2 parts of diluent, 0.5-1.0 part of defoaming agent and 0.6-0.8 part of active agent.
3. A paste for laser printing according to claim 2, wherein: comprises the following raw materials: 94 parts of conductive silver paste, 1.5-1.7 parts of adhesive, 0.8-1.0 part of curing agent, 0.8-1.0 part of release agent, 1.0-1.2 parts of diluent, 0.6-1.0 part of defoaming agent and 0.7 part of active agent.
4. A paste for laser printing according to claim 3, wherein: conductive silver paste, adhesive, curing agent, release agent, diluent, defoaming agent and active agent are 100 parts in total.
5. A paste for laser printing according to claim 3, wherein: comprises the following raw materials: 94 parts of conductive silver paste, 1.5 parts of adhesive, 1.0 part of curing agent, 0.8 part of release agent, 1.0 part of diluent, 1.0 part of defoaming agent and 0.7 part of active agent.
6. A paste for laser printing according to claim 3, wherein: comprises the following raw materials: 94 parts of conductive silver paste, 1.7 parts of adhesive, 0.8 part of curing agent, 1.0 part of release agent, 1.0 part of diluent, 0.8 part of defoaming agent and 0.7 part of active agent.
7. The paste for laser printing according to any one of claims 1 to 6, wherein: the adhesive adopts ethyl cellulose; the curing agent is polyamide; the release agent adopts dimethyl silicone oil; the diluent adopts diethylene glycol monobutyl ether; the defoaming agent adopts silicone oil; the active agent adopts polyethylene glycol.
8. A paste for laser printing according to any one of claims 1 to 7, wherein: the preparation method comprises the following steps:
step one, weighing conductive silver paste, an adhesive, a curing agent, a release agent, a diluent, a defoaming agent and an active agent according to the proportion of each component in the solar cell slurry;
dripping the diluent diethylene glycol monobutyl ether in the ingredients into the adhesive ethyl cellulose according to the proportion, and directly adding the mixture into the conductive silver paste for mixing after the adhesive is completely dissolved;
and step three, continuing adding the curing agent, the release agent, the defoaming agent and the active agent according to the proportion, fully mixing, placing in a high-speed stirrer, and uniformly stirring to obtain uniform slurry.
9. The paste for laser printing according to claim 8, wherein: and in the third step, the obtained uniform slurry is placed in a three-roll grinder and ground until the fineness of the conductive slurry is less than 15 mu m, the viscosity of the slurry is 200-450pa.s, and the solid content is 90-93%.
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| CN202211557206.5A CN115691856A (en) | 2022-12-06 | 2022-12-06 | Paste for laser printing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116525480A (en) * | 2023-05-10 | 2023-08-01 | 广东空天科技研究院(南沙) | Microscopic image-based automatic detection method for forming quality of laser grid line |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115083659A (en) * | 2022-07-20 | 2022-09-20 | 常州聚和新材料股份有限公司 | Conductive paste for laser transfer printing, and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115083659A (en) * | 2022-07-20 | 2022-09-20 | 常州聚和新材料股份有限公司 | Conductive paste for laser transfer printing, and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116525480A (en) * | 2023-05-10 | 2023-08-01 | 广东空天科技研究院(南沙) | Microscopic image-based automatic detection method for forming quality of laser grid line |
| CN116525480B (en) * | 2023-05-10 | 2023-11-10 | 广东空天科技研究院(南沙) | Microscopic image-based automatic detection method for forming quality of laser grid line |
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